State-owned oil firms have hiked auto LPG prices by Rs 6 per litre, the third increase this year.

Liquefied Petroleum Gas (LPG) used as fuel in automobiles, called auto LPG, will cost Rs 49.72 per litre as against Rs 43.65 per litre price till last month, according to Indian Oil Corporation, the nation's largest fuel retailer.

The hike comes on back of steep rise in international oil prices.

Auto LPG prices were hiked by almost Rs 3 per litre on March 1 when rates were increased from Rs 40.7 per litre to Rs 43.65 a litre.

Oil firms revise Auto LPG rates every month based on average of international benchmark prices.

On LPG they sell to households as cooking gas in 14.2-kg bottles, oil firms are losing a record Rs 570.50. The prices of domestic LPG were last revised in June last year and are currently priced at Rs 399.26 per cylinder in Delhi.